23 Appendix: recording inventory activity LO8 Campbell Company starts the month of January with 40 boxes of Platyp occurred during the month: us Bars costing $20 each. The following transactions 2 Jan. Purchased 15 additional boxes for $22 each. Paid 4 Jan. 10 Jan. 27 Jan. with cash. Paid freight costs of $30 on 2 January purchase. Sold 45 boxes for $40 each. Purchased 10 additional boxes on account for $23 each. Required ssuming that Campbell uses a periodic inventory system, repare all necessary joumal entries related to Campbell's r ventory activity. Calculate the cost of goods sold and the ending inventory under the FIFO, LIFO and weighted average costing methods